This page explains how Vladimir Poradich (USATT# 30896)'s rating went from 2194 to 2140 at the Potomac 2009 Spring Open held on - 10 May 2009. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.